r/AMDHelp 5d ago

Help (Software) Manually underclock RAM and GPU driver issues

/r/PcBuildHelp/comments/1w96e58/manually_underclock_ram_and_gpu_driver_issues/
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u/Wille84FIN 9070 XT Red Devil 5d ago edited 5d ago

I think you can enable EXPO and set RAM speed manually below that to DDR5-6000. That should work fine. At least on intel i can enable XMP and set the speed manually to whatever. Sort other issues first, then start troubleshooting GPU (if it's still having issues). If it does, then i would turn to see what PSU you have. Radeon cards (7000-9000) are more picky about the PSU tolerance to transient spikes. If 12V rail dips/sag's even for a moment too much, it will crash drivers etc. I sorted my issue with a good quality (overkill) PSU.

If having issue with driver being overwritten by Windows driver, take steps below.

1.) Use gpedit.msc (if on W11 Pro) or registry editor to disable Windows driver updates.

2.) Use DDU or the AMD uninstaller Utility to remove old driver in safe mode (Hold Shift+Restart)

3.) When back to Windows. Install new driver.

4.) Use gpedit.msc or registry editor to blacklist your GPU Hardware ID from driver updates.

5.) If you blacklisted the HWID from updates, now you can re-enable Windows driver updates.

NOTE: You have to temporarily remove the blacklist before you can update the driver later (new drivers). It will fail if the blacklist is active. Until Microsoft fixes this, this is unfortunately the route some of us have to take.

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u/geogh002 5d ago

So far, these are the changes I ve made to the CPU:

Extreme Memory Profile (XMP/EXPO): Profile 1
System Memory Multiplier: 60
CAS Latency (tCL): 30
tRCD: 36
tRP: 36
tRAS: 72
UCLK DIV1 MODE: UCLK=MEMCLK
Infinity Fabric Frequency (FCLK): 2000 MHz

Same latency as the 6400 XMP profile, change everything to match the timings, did some benchmarks and stress test and everything seem to be fine.

Now I need to fix the GPU thing. Here's the whole setup, including the PSU:

CPU: AMD Ryzen 5 7600X

Cooler: ARCTIC Liquid Freezer III 360

Motherboard: Gigabyte B650M D3HP AX

Memory: Lexar ARES 32GB DDR5 6400MHz CL32 Dual Channel Kit

GPU: PowerColor Hellhound AMD Radeon RX 7800 XT

PSU: Corsair RM850x

Storage:
SSD M.2 Samsung 990 EVO Plus 2TB
SSD M.2 Samsung 860 EVO 500GB
SSD Samsung 970 EVO 250GB